7.4.3 initdb: could not create semaphores

Hello

I have FreeBSD5.1, postgresql 7.4.3, when i tried to:

initdb -D /usr/local/pgsql/data

i receive:

......

selecting default max_connections... 10
selecting default shared_buffers... 50
creating configuration files... ok
creating template1 database in /usr/local/pgsql/data//base/1... FATAL: 
could not create semaphores: No space left on device
DETAIL:  Failed system call was semget(1, 17, 03600).
HINT:  This error does *not* mean that you have run out of disk space.
        It occurs when either the system limit for the maximum number of
semaphore sets (SEMMNI), or the system wide maximum number of semaphores
(SEMMNS), would be exceeded.  You need to raise the respective kernel
parameter.  Alternatively, reduce PostgreSQL's consumption of semaphores by
reducing its max_connections parameter (currently 10).
        The PostgreSQL documentation contains more information about
configuring your system for PostgreSQL.

initdb: failed
initdb: removing data directory "/usr/local/pgsql/data/"

When i tried to edit in /usr/local/share/postgres/postgresql.conf

and set max_connection = 8 nothing changed, initdb again used:

selecting default max_connections... 10

Why ?

How can i sovle this problem ?

Thanx

Michal